Apparatus for feeding scale-preventive compounds to boilers



(No Model.)

O. P. HALL.

APPARATUS FOR FEEDING SCALE PREVENTIVE COMPOUNDS T0 BOILERS.

110,549,479 Patented Nov. 5, 1895.

UNITED STATE PATENT OFFICE.

CHESTER P. HALL," OF CHICAGO, ILLINOIS.

APPARATUS FOR FEEDING SCALE-PBEVENTlVl-i COMPOUNDS T0- BOILEIiSr SPECIFICATION forming part of Letters PatentNo. 49,479, dated November 5, 1895.

Application filed March 14, 1895. Serial No. 541,796. (No model.)

To all whom it may concern:

Beit known that I, CHESTER P. HALL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certainnew and useful Improvements in Apparatus for Feeding Scale-Preventive Compounds to Boilers; and I do hereby declare the following to be a full, clear, and exactrdescription of the same, ref: erence being had to the accompanying drawing, forming a part of this specification.

This invention relates to an apparatus in which the scale-preventive compound is fed to the boilerat a point, between the boiler and feed-pump, so that the packing, &c., of such pump will not be exposed to the corrosive and injurious action of such compound;

and the object of the present invention is to provide a simple and eflicient form of apparatus by which such "gradual, uniform, and continuous feed of the scale-preventive is effected, and which, in addition, embodies the featuresof a ready and convenient recharging of the apparatus and avisible feed of thetcompound in its passage from the apparatus into the feed-water pipe of the boiler. I attain suchobjects by an apparatus of the construction'and arrangement of parts substantially as illustrated in the accompanying drawing, which represents a-view, thereof in sectional elevation.

In the feeding of scale-preventive compounds to steam-boilers as heretofore practiced it hasbee'n customary to feed the com pound in comparatively large quantities and atlong intervals into the boilers or to mix the same with the feed-Water before it has passed through the feed-pump.

\Vith the present invention the scale-preventive compound is fed in a gradual, uni

form and constant manner in the form of drops to the feed-water after it leaves the feed-pump and before it enters the boilers, so as to be thoroughly and uniformly mixed with such feed-water during thepas'sagq of the same to the boiler; and the present invention admits of the feeding of 'any desired quantity of the scale-preventive compound in a continuous manner and in a proportionate relation to the amount of feed water passing into the boiler.

In the carrying out of my present improved method I make use of an apparatus such as shown in the accompanying drawing, refering to which- 1 1 represents a single-acting cylinder for the "scale-preventive compoundhaving a piston 2.

3 is a double-acting operating cylinder of a comparatively larger area thanthe, cylinder 1 and provided rod 5. t

with a piston 4, connected I rigidly to the piston 2 by a connecting piston- 6 is'a'reversingwalve of a usual and well known form and having port or pipe communications 7 and 8 with the respective ends of the cylinder 3, a supply-pipe connection 9 p with the feed-water pipe 10,that extends fronr the feed-pump to the boiler, and a waste-pipe connection 11 through which the waste or exhaust takes place in'the operation of the cylinder 3. ,The valve 6 will be provided with an operating-handle .12 for convenient operation charge. a

13 is the storage tank or reservoir for the scale-preventive compound connected, .to the top portion of the cylinder .1 by a pipe-connect-ion 14, in which is inserted a check-valve 15 to prevent a backflow of the compound from the cylinder 1 to the tank 13 in the op- I eration of the. apparatus.

by the engineer or other person in 16 is a pet or air cock in the top portion of the cylinder 1 to admit of the escape of airder 1 by a connection 19 andat bottom with.

the feed-water pipe 10 by'a connection'20.'

This visible feed attachment is intended to contain a body of oil inthe'vertical passage 17, down through which the scale-preventiye com pound'descends by gravity in its passage to the feed-water pipelO. 21Jis a regulating-valve at the top of th compound fromtthe cylinder 1( The operation of my improved apparatus is as follows: In filling the apparatus the reversing-valve 6 is shifted so as to bring pressure through pipe or port 7 upon the upper side of the piston 4. The pistons-2 and 4 are thus caused to descend to their lower positions. The scale-preventive compound is thus drawn as well as forced by gravity into 7 and exhaust-pipe 11, which are now in communication. The pressure on the under side of the piston 4 causes the same to gradually ascend, forcing the piston 2 upward in unison and displacing the compound above the piston 2 out of the cylinder-1, through the visible feed 17, into the feed-Water pipe 10 in a gradual and uniform manner.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent isi 1. In an apparatus for feeding scale preventive compounds to boilers, the combination of a cylinder 1, provided with a piston 2, means for supplying said cylinder with the compound, a visible feed connection 17, between said cylinder 1, and the feed water pipe 10, and means for operating the piston 2, within the cylinder 1, substantially as set forth.

2. In an apparatus for feeding scale preventive compounds to boilers, the combination of a cylinder 1, provided with a piston 2, means for supplying said. cylinder with the "compound, the same consisting of a tank, 13,

pipe connection 14, and check valve 15, a visible feed connection 17 between said cylinder 1, and the feed water pipe 10, and means for o erating thepiston 2, within the cylinder 1,

, substantially as set forth,

3. In an apparatus for feeding scale preventive compounds, to boilers, the combination of a cylinder 1, provided with a piston 2, means for supplying said cylinder with the compound, a visible feed connection 17, between said cylinder 1, and the. feed water pipe 10, awaste cook 16, in the top portion of said cylinder 1, and means for operating the piston 2, within the cylinder 1, substantially asset forth.

4. In an apparatus for feeding scale preventive compounds to boilers, the. combination of a cylinder 1,-provided with a piston 2, means for supplying said cylinder, with the compound, the same consisting of a tank 13, pipe connection 14;, and check valve 15, a visible feed connection 17, between said cylinder 1, and the feed water pipe 10, a waste cock 16, in the top portion of said cylinder 1, and means for operating the piston 2, within the cylinder 1, theoutlet from the apparatus, as well, as the pressure inlet to the valve (3, being connected to the feed waterpipe 10, so that a volume of the feed water will be employed to force a less Volume of the compound into the passing feed Water substantially as set forth.

' 5. In an apparatus for feeding scale preventive compounds to boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4 therefor connected together, by a piston rod 5, a reversing valve 6, connected to the cylinder 3, and to the feed water pipe 10, a supply connection 11, to the upper end of the cylinder 1, and a connection between the upper end of the cylinder 1, and the feed water pipe 10, substantially as set forth.

6. In an apparatus for feeding scale preventive compounds to boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4, therefor, connected together by a piston rod 5, a reversing valve 6, connected to the cylinder 3, and to the feed water pipe 10, a supply connection 14, to the upper end of the cylinder 1, a waste cock 16, in the top portion of the said cylinder 1, and

a connection between the upper end of the 5 cylinder 1, and the feed water pipe 10, substantially as set forth.

7. In an apparatus for feeding scale preventive compounds to boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4, therefor, connected together'by a piston rod 5, a reversing valve 6, connected to the cylinder 3, and to the feed water pipe 10, a supply tank 13, connected to the upper end of the cylinder 1, bya connection 14, havinga check valve 15, and a connoction between the upper end of the cylinder 1, and the feed water pipe 10, substantially as set forth.

8. In an apparatus for feeding scale pre ventive compounds to boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4 therefor, connected together by a piston rod 5, a reversing valve 6, connected to the cylinder 3, and to the feed water pipe 10, a supply tank 13, connected to the upper end of the cylinder 1, by a connection 14, having a check valve 15, a waste cook 16, in the top portion of the cylinder 1, and a connection between the upper end of the cylinder 1, and the" feed water pipe 10, substantially as set forth.

, 9. In an apparatus for feeding scale pre ventive. compounds. to boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4 therefor, connected togather by a piston rod'5, a reversing valve 6, connected to the cylinder 3, and to the feed Water pipe 10, a supply connection 14, to the upper end of the cylinder 1, and a connection between the upper end of the cylinder 1,- and the feed water pipe 10, the same consisting in a down drop visible feed 17, substantially as set forth. a

10. In an apparatus for feeding scale preventive compounds to' boilers, the combination of the cylinders 1 and 3, of different areas, pistons 2 and 4 therefor, connected together by a piston rod 5, a reversing valve 6, connected to the cy1inder'3, and to the feed water pipe'lO, a supply connection 14, to the upper end of the cylinder 1,1a'waste cock 16, in the top portion of the said cylinder 1, and a connection between the upper end of the cylinder'l, and the feed water pipe 10, the same consisting in a down drop visible feed 17, substantially as set forth.

11.. In an apparatus for feeding scale preventive compounds to boilers, the combination of the cylinders 1 and 3, of difierent areas, pistons 2 and 4, therefor, connected together by a piston rod 5, a reversing valve 6, connected to the cylinder 3, and to the feed Water pipe 10, a supply tank 13, connected'to the upper end of the cylinder 1, by a connection 14, having a check valve 15, and a connection between theupper end of the cylinder, 1, and the feed Water pipe 10, the same consisting in a down drop visible feed 17, substantially as set forth.

a CHESTER P. HALL.

In presence of I ROBERT BURNS, GEO. H; ARTHUR. 

